Malicious PDF — malware analysis report

Static analysis result for SHA-256 e002e0c5a2ac2831…

MALICIOUS

PDF

75.1 KB Created: 2021-03-10 15:50:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 2a7a02777659702ca3eca0e183b4710d SHA-1: 900381e1d44ac490edd12b40d3c16b922166c572 SHA-256: e002e0c5a2ac2831939fc0fe8d121e8ed900896e1b91ff55af2aa13c498af89f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF file flagged by ClamAV as 'Pdf.Phishing.Trojan'. Heuristics indicate it functions as a link farm hosted on disposable domains, with a high concentration of links pointing to external URIs. The primary malicious URL identified is 'https://maypoin.ru/award?keyword=blucher+rules+pdf', suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://maypoin.ru/award?keyword=blucher+rules+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4463266/normal_5fe432c458169.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366325/normal_600c4183b442e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464070/normal_600ded2d2ec1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491933/normal_6020b701a5f1f.pdfIn PDF document text
    • http://lesalufijo.iblogger.org/limiting_adjectives_worksheets_for_grade_3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ae5cfe7-6dc4-4775-9827-3980bf69e771/how_to_program_esp8266_without_arduino_ide.pdfIn PDF document text
    • https://45f61934-b4a1-4335-a9e3-e142d9465b5b.filesusr.com/ugd/0dd040_5ef5e9fd542044eebcb7aec0c13b1c13.pdf?index=trueIn PDF document text
    • https://7ed754b6-a209-4558-9281-0032c7ee8ade.filesusr.com/ugd/4329d7_a36186baf8a04fc6852ea3ed0172c29f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3156c28b-e769-4bba-bd97-eaa699e25a31/i_was_sitting_at_the_counter.pdfIn PDF document text
    • https://ca3ec1ac-6ff7-4c8f-ae0f-86a30d86e335.filesusr.com/ugd/3615fb_36debe324f1748f6b8a18c14d019ee27.pdf?index=trueIn PDF document text
    • http://xatenekoroxaju.epizy.com/77089885291.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/34866877695.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/ziganasirotonoguke.pdfIn PDF document text
    • http://wajoran.rf.gd/83539674461.pdfIn PDF document text
    • http://kovodolalaloru.rf.gd/what_is_the_difference_between_journalism_and_mass_communication.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0638cf50-1127-45bb-9539-efa4170526a6/53486286757.pdfIn PDF document text
    • https://8ecf7690-1f99-4e28-a4b6-3228ba9731d7.filesusr.com/ugd/63d3ad_3b60c8881d63486f88a73d350bfd5700.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xidazeze/wexulurewisuperunijup.pdfIn PDF document text
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_9e52e1343b40425080e7e5057ff0ebe3.pdf?index=trueIn PDF document text
    • http://kegedefetiliw.rf.gd/96775025109.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/loan_agreement_template_family_member.pdfIn PDF document text
    • http://xiwularofevomu.epizy.com/anticoagulant_preparation.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB58 5084 bytes
SHA-256: 0a5a26db110bd89dad7f31891ea231ef7de89d673204058175916417c13ea32c
font_01_sfnt_off0000fca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA0 10208 bytes
SHA-256: 56df537e8ccb92a28aa50bc44f79535aa7675bcaf706b36fe780d6bd42b7e5a7

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